*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  --bg: #f3f5f8;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #121826;
  --muted: #5d6677;
  --soft: #8b93a6;
  --line: rgba(18, 24, 38, 0.1);
  --line-strong: rgba(18, 24, 38, 0.16);
  --accent: #1261ff;
  --accent-soft: rgba(18, 97, 255, 0.08);
  --shadow: 0 18px 50px rgba(18, 24, 38, 0.08);
  --max-width: 820px;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(18, 97, 255, 0.14) 0, rgba(18, 97, 255, 0) 28%),
    radial-gradient(circle at top right, rgba(16, 185, 129, 0.08) 0, rgba(16, 185, 129, 0) 22%),
    linear-gradient(180deg, #f7f9fc 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.16em;
}

a:hover {
  color: #0c4ed3;
}

.blog-shell,
.post-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

.blog-header {
  padding: 1.1rem 0 0;
}

.blog-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.blog-home,
.blog-toplink {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--muted);
}

.blog-home:hover,
.blog-toplink:hover {
  color: var(--text);
}

.blog-kicker,
.post-kicker {
  display: inline-flex;
  align-items: center;
  margin: 1.3rem 0 0.6rem;
  padding: 0.32rem 0.62rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.blog-header h1,
.post-header h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.blog-intro,
.post-meta,
.post-updated {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.blog-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.blog-nav a {
  padding: 0.55rem 0.82rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.16s ease, background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.blog-nav a:hover {
  border-color: rgba(18, 97, 255, 0.25);
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  transform: translateY(-1px);
}

.blog-list {
  display: grid;
  gap: 1rem;
  margin-top: 2.4rem;
}

.post-card,
.blog-empty,
.post {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.post-card,
.blog-empty {
  padding: 1.45rem 1.45rem 1.55rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.post-card:hover {
  border-color: rgba(18, 97, 255, 0.22);
  box-shadow: 0 22px 60px rgba(18, 24, 38, 0.11);
}

.post-card-meta,
.post-meta,
.post-updated {
  margin: 0;
  color: var(--soft);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.post-card h2 {
  margin: 0.5rem 0 0.45rem;
  max-width: 34rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.post-card h2 a {
  color: var(--text);
  text-decoration: none;
}

.post-card h2 a:hover {
  color: var(--accent);
}

.post-card p,
.blog-empty p {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.post-card-link::after {
  content: "\2192";
  transition: transform 0.16s ease;
}

.post-card:hover .post-card-link::after {
  transform: translateX(2px);
}

.blog-empty h2 {
  margin: 0 0 0.4rem;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}

.blog-empty p + p {
  margin-top: 0.7rem;
}

.post {
  padding: 1.9rem 1.5rem 2.2rem;
  background: var(--surface-strong);
}

.post-header {
  padding-bottom: 1.35rem;
  border-bottom: 1px solid var(--line);
}

.post-backlink {
  margin: 0 0 1rem;
}

.post-backlink a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.post-backlink a:hover {
  color: var(--text);
}

.post-header h1 {
  max-width: 42rem;
}

.post-meta {
  margin-top: 1.25rem;
}

.post-updated {
  margin-top: 0.45rem;
}

.post-body {
  padding-top: 1.45rem;
  color: #243042;
  font-size: 1.03rem;
}

.post-body > :first-child {
  margin-top: 0;
}

.post-body > :last-child {
  margin-bottom: 0;
}

.post-body h2,
.post-body h3,
.post-body h4 {
  margin: 2rem 0 0.75rem;
  color: var(--text);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.post-body h2 {
  font-size: 1.65rem;
}

.post-body h3 {
  font-size: 1.3rem;
}

.post-body p,
.post-body ul,
.post-body ol,
.post-body blockquote,
.post-body pre,
.post-body .post-table-wrap {
  margin: 0 0 1.15rem;
}

.post-body ul,
.post-body ol {
  padding-left: 1.25rem;
}

.post-body li + li {
  margin-top: 0.35rem;
}

.post-body blockquote {
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid rgba(18, 97, 255, 0.35);
  color: #465164;
}

.post-body pre {
  overflow-x: auto;
  padding: 1rem 1.05rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  background: #0f1726;
  color: #edf2ff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.post-body .post-table-wrap {
  overflow-x: auto;
}

.post-body table {
  width: 100%;
  min-width: 28rem;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
}

.post-body th,
.post-body td {
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.post-body th {
  background: rgba(18, 97, 255, 0.05);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 700;
}

.post-body td {
  color: #334155;
}

.post-body tbody tr:last-child td {
  border-bottom: none;
}

.post-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92em;
}

.post-body p code,
.post-body li code,
.post-body blockquote code {
  padding: 0.14rem 0.34rem;
  border-radius: 7px;
  background: rgba(18, 97, 255, 0.08);
  color: #0d4fd2;
}

.post-body img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.blog-footer {
  margin-top: 1.9rem;
  color: var(--soft);
  font-size: 0.84rem;
}

@media (max-width: 640px) {
  .blog-shell,
  .post-shell {
    padding: 2.35rem 1rem 3rem;
  }

  .blog-nav {
    gap: 0.6rem;
  }

  .blog-topbar {
    margin-bottom: 1.15rem;
  }

  .blog-nav a {
    font-size: 0.85rem;
  }

  .post-card,
  .blog-empty,
  .post {
    border-radius: 20px;
  }

  .post-card,
  .blog-empty,
  .post {
    padding-left: 1.05rem;
    padding-right: 1.05rem;
  }
}